Know more about Combo-search
Combo-search
enables you to switch your browser's default search engine. Simply
click on the Combo-search icon in the Firefox extensions bar and select
the search engine that best suits what you need from the list and click
'Set'. Combo-search Firefox extension is free to download directly from
the Firefox Web store. Our service will provide you with a choice of the
most popular and well regarded search engines, leading to better
targeted search results, letting you discover more of the web and giving
you access to the most relevant content. Our basic version of the
service will be offered free of charge.

tampermonkey plugin available for Chrome and Firefox
Earnably account: Sign up
US IP (Warning: Never login to your Earnably account using a VPN/VPS. You will get banned.)

So if you need to use a US VPN, you need to LOG OUT of your Earnably
account first. Or else, poof! Your account will be locked. And you will
never be able to create another one again. But you can beg their
Support. (Basically you MUST use your ORIGINAL IP inside Earnably)

Step 1: Login to your Earnably. (DON'T USE VPN/VPS as mentioned)
Step 2: Go to http://earnably.com/settings/ and click Account Details. Look for your User ID in the first box and copy that down. (Something like: 75069)

Step 3: Now you are ready for the rape. You need US IP for this step, so be sure to LOG OUT of earnably.

After installing Tampermonkey, add a new script (self-explanatory).

Here is the script: Please contact us to get the script or post your email id in comment.